Powerful lock bolt

Abstract

The utility model relates to a powerful lock bolt which comprises a bolt and a combined nut, the combined nut comprises a step nut, a ratchet wheel cap, a check pawl and a locking piece, the step nut comprises a large-diameter section and a small-diameter section, the ratchet wheel cap is installed on the small-diameter section, the check pawl is located on the outer side of the small-diameter section, and ratchets are arranged in the ratchet wheel cap; a sliding groove is formed in the tail of the bolt, a sliding block used for being in sliding fit with the sliding groove is arranged on the inner side of the ratchet wheel cap, an anti-disengaging ring groove is formed in the outer side of the small-diameter section, a through structure corresponding to the anti-disengaging ring groove is arranged on the ratchet wheel cap, and the locking piece is clamped into the anti-disengaging ring groove through the through structure to achieve connection of the ratchet wheel cap and the step nut. During use, the ratchet cap is matched with a bolt in a rotation stopping mode through the sliding block, and the step nut rotates in one direction relative to the ratchet cap in the thread screwing-in direction and is stopped by the ratchet cap in the thread screwing-out direction. The strong anti-loosening bolt has large reverse torsion resistance strength, the problem that the bolt is loosened in the using process can be solved to a large extent, and stability and fastening of an installation structure are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of connector fastening structures, and more particularly to a strong anti-loosening bolt. Background Art

[0002] Bolts are a common threaded fastener and are widely used in various fields. However, bolts are prone to loosening during use due to vibration, swinging, and other reasons, which poses a great safety hazard and can easily cause immeasurable losses. In order to prevent bolts from loosening, common methods include adding flat spring washers, toothed washers, and using double nuts for locking. However, the above methods have low anti-reverse torque and limited anti-slip effect, and mainly prolong the loosening time but cannot completely prevent loosening. Especially in the field of power transmission, loosening of (power) bolts can cause poor contact between connecting parts, severe heating, and eventually burn out of the connecting parts, bringing more serious safety risks and consequences to power transmission facilities. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a strong anti-loosening bolt, which can solve the technical problems that the current bolts have limited anti-loosening effect and are prone to loosening.

[0004] The utility model provides the following technical solutions:

[0005] A strong anti-loosening bolt comprises a bolt and a combination nut, the combination nut comprises a step nut, a ratchet cap, a non-return pawl and a locking piece, the step nut comprises a large diameter section on the front side and a small diameter section at the rear side, the ratchet cap is mounted on the small diameter section, the non-return pawl is located on the outside of the small diameter section, and ratchet teeth are arranged inside the ratchet cap for cooperating with the non-return pawl to prevent rotation in one direction; a sliding groove which passes through the tail end of the bolt is provided, a slider for slidingly cooperating with the sliding groove is provided on the inside of the ratchet cap, an anti-slip ring groove is provided on the outside of the small diameter section, and a through structure connecting the outside and the anti-slip ring groove is provided on the ratchet cap corresponding to the anti-slip ring groove, and the locking piece is clamped in the anti-slip ring groove through the through structure to realize the connection between the ratchet cap and the step nut; when in use, the ratchet cap cooperates with the bolt to prevent rotation through the slider, and the step nut rotates unidirectionally relative to the ratchet cap in the direction of thread screwing in and is prevented from rotating by the ratchet cap in the direction of thread screwing out.

[0006] Furthermore, the non-return pawl is an L-shaped spring pin, which includes a short side of the head and an arc-shaped long side that are perpendicular to each other. A mounting groove for clamping the L-shaped spring pin is provided on the outside of the small diameter section. The mounting groove includes an annular clamping groove and an axial pressure groove that intersects the annular clamping groove perpendicularly. The axial pressure groove is used to accommodate the short side of the head, and the annular clamping groove is used to accommodate the arc-shaped long side. The tail of the arc-shaped long side extends out of the arc-shaped clamping groove and cooperates with the ratchet teeth inside the ratchet cap to prevent one-way rotation.

[0007] Furthermore, the locking piece is an elastic door-shaped snap ring, and the through structure is two through grooves symmetrically opened on both sides of the ratchet cap. The elastic door-shaped snap ring includes a connecting arm and two mutually parallel clamping arms, one end of the two clamping arms is connected by the connecting arm, and the other end is an open end; when in use, the elastic door-shaped snap ring is clamped on the outside of the ratchet cap, and the clamping arm is correspondingly arranged at the through groove and clamps the anti-ring groove inside the through groove, the locking ratchet cap and the step nut.

[0008] Furthermore, the clamping arm is provided with an anti-slip arm bent inwardly relative to the clamping arm at the open end. When in use, the anti-slip arm is used to block the ratchet cap to prevent the elastic door-shaped clamping ring from radially escaping from the ratchet cap.

[0009] Furthermore, the locking piece is an elastic clamping rod, and the through structure is a through hole set on the ratchet cap. The elastic clamping rod is inserted into the through hole and cooperates with the through hole. The inner end of the elastic clamping rod is clamped into the anti-slip ring groove to connect the ratchet cap and the step nut.

[0010] Furthermore, the locking piece is a locking bolt, the through structure is a threaded hole set on the ratchet cap, the locking bolt is threadedly connected to the threaded hole, the inner end of the locking bolt is stuck in the anti-slip ring groove, connecting the ratchet cap and the step nut.

[0011] Beneficial effect: When installing the powerful anti-loosening bolt of the utility model, the L-shaped spring pin is installed on the small diameter section of the step nut, and then the ratchet cap is sleeved on the outside of the small diameter section of the step nut, and the ratchet cap and the step nut are locked and fixed with a locking piece, and then the combined nut is installed together at the tail of the bolt. During the installation process, the step nut can rotate unidirectionally relative to the ratchet cap in the direction of thread screwing. During the screwing process, the ratchet cap slides along the groove on the surface of the bolt under the action of the slider. When the step nut is screwed into the corresponding position, the tightening is completed. When the step nut is subjected to vibration or swing, the check ratchet cap will stop the step nut from rotating in the direction of thread screwing. The pawl and the ratchet cap cannot be reversely unscrewed and loosened under the reverse rotation blocking action. The combined nut is clamped by a mechanical mechanism, and its reverse torsional resistance reaches the strength of violently destroying the mechanical pair, making it difficult to loosen the bolt, avoiding the safety hazards caused by loose bolts in actual engineering applications. When disassembling, the utility model only needs to remove the locking piece to separate the ratchet cap from the step nut. After removing the ratchet cap, the step nut can be reversely unscrewed. The disassembly operation is simple and maintenance work is convenient, which can overcome the shortcomings of the current anti-loosening bolts that cannot be reused after disassembly and the high cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural explosion diagram of a specific embodiment 1 of a strong anti-loosening bolt of the utility model;

[0013] Figure 2 This is a structural diagram of a step nut in a specific embodiment 1 of a strong anti-loosening bolt of the utility model;

[0014] Figure 3 This is a schematic structural diagram of an L-shaped spring pin in a specific embodiment 1 of a strong anti-loosening bolt of the utility model;

[0015] Figure 4 This is a structural diagram of a ratchet cap in a specific embodiment 1 of a powerful anti-loosening bolt of the utility model;

[0016] Figure 5 This is a schematic structural diagram of an elastic door-shaped clamping ring in a specific embodiment 1 of a strong anti-loosening bolt of the utility model;

[0017] Figure markings: 1-bolt; 11-slide groove; 2-step nut; 21-large diameter section; 22-small diameter section; 221-annular clamping groove; 222-axial pressure groove; 223-anti-slip ring groove; 3-L-shaped spring pin; 31-short side of the head; 32-arc-shaped long side; 4-ratchet cap; 41-ratchet; 42-slider; 43-through groove; 5-elastic door-type clamping ring; 51-clamping arm; 52-connecting arm; 53-anti-slip arm. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings.

[0019] Specific embodiment 1 of a strong anti-loosening bolt of the utility model:

[0020] like Figure 1-Figure 5 As shown, the strong anti-loosening bolt includes a bolt 1 and a combination nut. The combination nut mainly consists of a step nut 2, a ratchet cap 4, a non-return pawl and a locking piece. The step nut 2 includes a large diameter section 21 on the front side and a small diameter section 22 on the rear side. The ratchet cap 4 is connected to the small diameter section 22. Ratchet teeth 41 are provided inside the ratchet cap 4 and a non-return pawl is provided outside the small diameter section 22, so that the ratchet cap 4 and the step nut 2 can cooperate in a one-way anti-rotation manner. In this embodiment, the non-return pawl is an L-shaped spring pin 3, as shown in FIG. Figure 3 As shown, the L-shaped spring pin 3 includes a short side 31 and an arc-shaped long side 32, which are perpendicular to each other. Correspondingly, a mounting groove for retaining the L-shaped spring pin 3 is provided on the outer side of the small-diameter section 22. The mounting groove includes an annular retaining groove 221 and an axial pressure groove 222 perpendicularly intersecting the annular retaining groove 221. During installation, the short side 31 of the L-shaped spring pin 3 is located within the axial pressure groove 222. The annular retaining groove 221 is used to accommodate the arc-shaped long side 32, and the tail of the arc-shaped long side 32 extends outside the arc retaining groove and engages with the ratchet teeth 41 inside the ratchet cap to prevent one-way rotation. The L-shaped spring pin 3 has a simple structure, is easy to install, is economical, and has strong practicality. The tail of the bolt 1 is provided with a slide groove 11 that extends through the tail end of the bolt 1. The ratchet cap 4 is provided with a slider 42 on the inside of the slide groove 11 for sliding engagement with the slide groove 11, thereby ensuring that the ratchet cap 4 can only move linearly relative to the bolt 1 and cannot rotate relative to the bolt 1.

[0021] The locking member is used to achieve a fastening connection between the ratchet cap 4 and the step nut 2. An anti-slip groove 223 is provided on the outer side of the minor diameter section 22. A through-structure connecting the outside with the anti-slip groove 223 is provided on the ratchet cap 4 corresponding to the anti-slip groove 223. The locking member is inserted into the anti-slip groove through the through-structure to achieve the connection between the ratchet cap 4 and the step nut 2. In this embodiment, the locking member is an elastic gate-shaped snap ring 5. The through-structure is composed of two through-grooves 43 symmetrically provided on both sides of the ratchet cap. The elastic gate-shaped snap ring 5 includes a connecting arm 52 and two mutually parallel clamping arms 51. The two clamping arms 51 have one end connected by the connecting arm and the other end is open. When in use, the elastic gate-shaped snap ring 5 is clamped onto the outer side of the ratchet cap 4. The clamping arms 51 are correspondingly provided at the through-grooves and clamp the anti-slip groove 223 inside the through-grooves to achieve the purpose of locking the ratchet cap 4 and the step nut 2. In order to prevent the elastic door-shaped snap ring 5 from radially escaping from the ratchet cap 4, the clamping arm 51 is provided with an anti-slip arm 53 bent inward relative to the clamping arm 51 at the open end. When in use, the anti-slip arm 53 is used to block the ratchet cap so that the elastic door-shaped snap ring 5 is firmly fixed to the outside of the ratchet cap 4.

[0022] When installing this powerful anti-loosening bolt, install the L-shaped spring pin 3 in the installation groove outside the small diameter section 22, then put the ratchet cap 4 on the outside of the small diameter section, put the elastic door-shaped retaining ring 5 on the outside of the ratchet cap 4, lock the ratchet cap 4 and the step nut 2, and then install the combination nut together at the tail end of the bolt 1. The step nut 2 is rotated unidirectionally relative to the ratchet cap in the direction of thread screwing. During the screwing process, the ratchet cap 4 slides along the groove 11 on the surface of the bolt under the action of the slider. When the step nut 2 is screwed into the corresponding position, the tightening is completed. When subjected to vibration and swing, the step nut cannot be reversed and loosened due to the reverse rotation resistance of the L-shaped spring pin 3 and the ratchet cap 4. The combination nut is locked by a mechanical mechanism. Its reverse torsional resistance reaches the strength that can violently destroy the mechanical pair. It is durable and difficult to loosen the bolt, avoiding the safety hazards caused by loose bolts in actual engineering applications and reducing the safety risks of loose bolts to engineering facilities.

[0023] During disassembly, the elastic door-shaped retaining ring 5 is removed to separate the ratchet cap 4 from the step nut 2. After removing the ratchet cap 4, the step nut 2 can be reversely screwed out. The disassembly operation is simple and convenient for maintenance work. It can overcome the shortcomings of the current anti-loosening bolts that they cannot be reused after disassembly and the high cost of use. It is particularly suitable for use as power bolts in the power transmission field.

[0024] Specific embodiment 2 of a strong anti-loosening bolt of the utility model:

[0025] The difference from Example 1 is that the locking piece is an elastic clamping rod, and the through structure is a through hole set on the ratchet cap. The elastic clamping rod is inserted into the through hole and cooperates with the through hole. The inner end of the elastic clamping rod is clamped into the anti-slip ring groove to achieve a fastening connection between the ratchet cap and the step nut.

[0026] Specific embodiment 3 of a strong anti-loosening bolt of the utility model:

[0027] The difference from Example 1 is that the locking part is a locking bolt, the through structure is a threaded hole set on the ratchet cap, the locking bolt is threadedly inserted into the threaded hole, and the inner end of the locking bolt is stuck in the anti-slip ring groove to achieve a fastening connection between the ratchet cap and the step nut.

[0028] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A strong anti-loosening bolt, characterized in that: The invention comprises a bolt and a combination nut, wherein the combination nut comprises a step nut, a ratchet cap, a non-return pawl and a locking piece, wherein the step nut comprises a large diameter section on the front side and a small diameter section on the rear side, the ratchet cap is mounted on the small diameter section, the non-return pawl is located on the outside of the small diameter section, a ratchet is arranged inside the ratchet cap for cooperating with the non-return pawl in one-way rotation prevention; a slide groove penetrating the rear end of the bolt is arranged at the tail end of the bolt, a slider for slidably cooperating with the slide groove is arranged on the inside of the ratchet cap, an anti-slip ring groove is arranged on the outside of the small diameter section, a through structure connecting the outside with the anti-slip ring groove is arranged on the ratchet cap corresponding to the anti-slip ring groove, the locking piece is clamped into the anti-slip ring groove through the through structure to realize the connection between the ratchet cap and the step nut; when in use, the ratchet cap cooperates with the bolt to stop rotation through the slider, the step nut rotates unidirectionally relative to the ratchet cap in the direction of thread screwing in, and is blocked by the ratchet cap in the direction of thread screwing out.

2. A strong anti-loosening bolt as claimed in claim 1, characterized in that: The non-return pawl is an L-shaped spring needle, which includes a short side of the head and an arc-shaped long side that are perpendicular to each other. A mounting groove for clamping the L-shaped spring needle is provided on the outside of the small diameter section. The mounting groove includes an annular clamping groove and an axial pressing groove that intersects the annular clamping groove perpendicularly. The axial pressing groove is used to accommodate the short side of the head, and the annular clamping groove is used to accommodate the arc-shaped long side. The tail of the arc-shaped long side extends out of the arc-shaped clamping groove and cooperates with the ratchet teeth inside the ratchet cap to prevent one-way rotation.

3. A strong anti-loosening bolt as claimed in claim 1 or 2, characterized in that: The locking piece is an elastic door-shaped snap ring, and the through structure is two through grooves symmetrically opened on both sides of the ratchet cap. The elastic door-shaped snap ring includes a connecting arm and two mutually parallel clamping arms, one end of the two clamping arms is connected by the connecting arm, and the other end is an open end; when in use, the elastic door-shaped snap ring is clamped on the outside of the ratchet cap, and the clamping arm is correspondingly arranged at the through groove and clamps the anti-slip groove inside the through groove, locking the ratchet cap and the step nut.

4. A strong anti-loosening bolt as claimed in claim 3, characterized in that: The clamping arm is provided with an anti-slip arm bent inwardly relative to the clamping arm at the open end. When in use, the anti-slip arm is used to block the ratchet cap to prevent the elastic door-shaped clamping ring from radially slipping out of the ratchet cap.

5. A strong anti-loosening bolt as claimed in claim 1 or 2, characterized in that: The locking piece is an elastic clamping rod, and the through structure is a through hole set on the ratchet cap. The elastic clamping rod is inserted into the through hole and has an interference fit with the through hole. The inner end of the elastic clamping rod is clamped into the anti-slip ring groove to connect the ratchet cap and the step nut.

6. A strong anti-loosening bolt as claimed in claim 1 or 2, characterized in that: The locking piece is a locking bolt, the through structure is a threaded hole arranged on the ratchet cap, the locking bolt is threadedly connected with the threaded hole, the inner end of the locking bolt is inserted into the anti-slip ring groove, and the ratchet cap and the step nut are connected.

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